/*
 * Copyright 2009-2009 Tanesha Project. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 *    1. Redistributions of source code must retain the above copyright notice, 
 *    	 this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice,
 *    	 this list of conditions and the following disclaimer in the documentation 
 *    	 and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY EXPRESS OR 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 *  OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * The views and conclusions contained in the software and documentation are those 
 * of the authors and should not be interpreted as representing official policies, 
 * either expressed or implied, of the Tanesha Project.
 */
package com.google.api.chart.encoding;


public class ExtendedDataEncoder extends SimpleDataEncoder {

	private static String EXTENDED_ENCODING = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.";

	@Override
	protected String prefix() {
		return "e:";
	}
	
	@Override
	protected String encodeSingle(int number) {
		if (number > 4095 || number < 0)
			return "__";
		else {
			int esln = EXTENDED_ENCODING.length();
			return String.valueOf(EXTENDED_ENCODING.charAt((int) Math.floor(number / esln)))
				+ String.valueOf(EXTENDED_ENCODING.charAt(number % esln));
		}
	}
}
